Henry buefoed



I 3mm;

2 SHEETS-SHEET 1.

PATENTED FEB. 16,1904. H. BUBFORD.

DISK SHARPBNEB APPLIUATIbNI'iLED JULY 13,, 1903.

N0 MODEL.

No. 752,514. PATENTED FEB. 16, 1904.

' H. BURPORD.

DISK SHARPENBR.

APPLIGATION FILED JULY 1a, 1903 no MODEL. 2 SHEETS-SHEET 2.

4 5 q & j I,

.liiillllllllm lllllllllizw V awe/Mot UNITED STATES Patented February 16, 1904.

PATENT OFFICE.

DISK-SHARPENEB- SPECIFICATION forming part Of Letters Patent N0. 752,514, dated February 16, 1904;.

Application filed JulylS, 1903 Serial No. 166,117. (No model.)

To all whom it may'concern:

Be it known that I, HENRY Bunronn, a citizen of the United States, residing at Millcreek, Indian Territory, have invented new and useful Improvements in Disk Sharpeners, of which the following is a specification.

This invention relates to a disk-sharpener adapted for application to cultivating machines; and the primary object of the same is to provide a sharpening device which remains applied to the beam of a disk cultivator in such position that the sharpening device thereof may be easily brought into engagement with the disk edge and sharpen the latter while the machine is in motion without requiring a removal of the disks or the least disorganization of the machine parts to arrive at the result sought. I

A further object of the invention is to provide a disk-sharpening device for application to 'a' cultivator wherein the parts are easily operated and comparatively simple in construction and having means whereby the sharpening devices thereof may be thrown into engagement with thp disk by the application of the foot of the operator thereto at any time found necessary.

With these and other objects and advantages in view the invention consists in the construction and arrangement of the several parts,

which will be hereinafter more fully described and claimed.

In the drawings, Figure 1 is a perspective view of a disk cultivator, showing the -improved sharpening device applied thereto. Fig. 2 is adetail perspective view, on an em larged scale, of the sharpening device, with the support therefor illustrated in dotted lines. Figs. 3 and 4; are detail perspective views of parts of the sharpening device. Fig. 5 is a detail perspective view of a chisel forming part of the disk-sharpener. j

Similar numerals of reference are employed to indicate-corresponding parts in the'several views.

- The improved attachment is adapted to be applied to any cultivating -machine having disks as a part thereof and may be so disposed as to operate with either the rear or front portion of the disk or with a machine having a single disk or a number of the latter. When the attachment is used in connection with a machine embodying a number of disks, it will be understood that a corresponding number of sharpening devices willbe employed.

In the accompanying drawings one form of disk cultivator is shown to illustrate the application of the sharpening device, and therein the numeral 1 designates a beam having in suitable supported relation thereto a disk 2 and an operators seat 3 in rear of the disk. The improved sharpening device is suitably secured to the beam 1 and consists of a bracket 1 with an outstanding stud or pin 5 at the rear end,provided with screw-threads extending over a portion of its length to receive a nut 6. (See Fig. 4.) A lug 7 extends upwardly over the upper edge of the bracket in advance of the plane of the stud 5. and at its upper end said lug has an outwardly-projecting boss 8, from the center of which a stud 9 extends, and is formed with screw-threads over a portion thereof for a purpose which will be presently explained. The forward extremity of the bracket has a pair of outwardly projecting horizontally disposed flanges 10 with screw-threaded openings 11 therethrough, the said flanges being in vertical alinement. To the inner side of the front extremity of the bracket a clip member 12 is secured to cooperate with a companion clip member 13 for securing the upper part of the attachment to a depending curved support 14 by means of a connecting-bolt 15. The depending support l i is attached at its upper end to the beam 1 and curves downwardly and forwardly close to the inner or convex side of the disk 2 to properly position the attachment in relation to the latter. The bracket 4 gradually increases in width from its rear end toward its front end to compensate for the movement of a shifting lever 16, consisting of a bar having a rear enlarged end 17 with a longitudinal slot 18, through which the stud 5 loosely extends, the rear. end of said bar being held on the stud by the nut 6. At an intermediate point the shifting lever hasan outstanding pin or stud 19, and near its front end'is ahorizontally-disposed bearing-lug" 20, having upper and lower parallel faces which are held in'p'rox-' imity to adjusting-screws 21, mounted in the flanges 10 to vary and limit the vertical movementof the shifting lever. The ends of the screws 21 will be held in such loose relation to the bearing-lug 20 that the longitudinal shifting movement of the lever 16 will not be in the least restricted; but by varying the adjustment of the screws 21 in the flanges 10 the said shifting lever may be caused to approach the adjacent edge of the disk at different angles, in accordance with the requirements of the sharpening operation. The shifting lever has both a pivotal and a sliding movement, and on the free end thereof in advance of the bearing-lug 20 a sharpening device 22 is removably held by a clamp consisting of a clip 23 and a U- shaped bolt 24, terminally extending through the clamp and held in place by suitable nuts. The sharpening device 22 may be of any suitable form, and one edge thereof will operate as a chisel on the edge of the disk 2 with which it engages. At any time desired this device may be removed and sharpened without detaching the remaining portions of the attachment and afterward reapplied by simple manipulation of the clamp therefor.

- An actuating-lever 25 has its upper end secured on the stud 9 by'a suitable nut, and'below its upper end said lever is enlarged and formed with a vertical slot 26, through which the pin or stud 19 on the shifting lever loosely projects. Below the slot 26 the actuating-lever 25 is curved rearwardlyto give it the necessary throw or movement by the mechanism which will be presently explained, and to the lower end of said lever a connecting-rod 27 is movably attached and projects downwardly to the lower end of a treadle-lever 28, fulcrumed at an intermediate point on a stud 29, projecting outwardly from the upper end of a clip-plate 30, which is applied against the support 14 and has a companion clip-plate 31 attached thereto by bolts 32 to maintain this part of the attachment in proper spaced relation to that above. The treadle-lever 28 has an upper horizontally-disposed tread-bar 33, which is located outside of the disk 2 within convenient reaching distance of the foot of the operator occupying the seat 3.

After the parts of the attachment have been applied to the support 14: and the shifting lever 16 adjusted as desired the sharpening device 22 may be adjusted at any time to engage the edge of the disk 2 by pressing downwardly on the treadle-lever 28, and thereby throwing the connecting-rod 27 upwardly and moving the actuating-lever 25 both upwardly and forwardly. When the pin or stud 19 strikes the bottom of the slot 26 of the lever 25, the shifting lever 16 is drawn forwardly such distance as to cause the sharpening device 22 to engage the edge of the disk 2 on the convex side of the latter. The device 22 will be held in engagement with the disk, as just explained, as

long as the operator depresses the treadle 28 to insure a thorough sharpening of the disk 2 engaged; but as soon as pressure is relieved from the treadle-lever the several parts assume a normal position and the cutter is withdrawn from the disk.

It has heretofore been stated that in the use of the sharpening device in connection with gang-plows embodying a number of disks a proportionate number of sharpening devices will be employed. It is obvious that this would be expensive and a simpler method of arriving at the sharpening operation in relation to the disks by a single attachment would be to individually shift the disks or position them adjacent to the sharpener.

. One of the main advantages of the present improved attachment is that it is unnecessary to stop the cultivator or plow to sharpen a disk, and another advantage is that the attachment may be applied to a cultivator or plow without requiring the least reorganization of such cultivator or any special construction .to receive the attachment.

It is proposed to secure the support 14 to the beam 1 by bolting or otherwise, and in View of the fact that the attachment can be readily applied to any cultivator or plow it can be manufactured and sold as a separate structure and applied to cultivators or plows now in use.

Another advantageous feature of the improved attachment is that the means for holding the parts on the support 14:, embodying the clip-plates and connecting-bolts therefor, may be applied at any point on the support to bring the sharpening device at different elevations in relation to the disk and to accommodate a difference in elevation of the beam or supporting-frame of the cultivator or plow in various makes of the latter and also to provide for having the cutter engage the disk at a point where it will most effectually operate as a sharpening medium.

It is also proposed to vary the proportions and dimensions, as well as the minor details of construction, to accommodate various applications without departing from the spirit of the invention.

Having thus fully described the invention, what is claimed as new is 1. A disk-sharpening attachment for cultivators, comprising a pivoted longitudinallyshiftable lever having at one end thereof a sharpening device, and means for operating said lever to carry said device into and out of engagement with the edge of the disk at will.

2. A disk-sharpening attachment for cultivators comprising a pivoted longitudinallyshiftable lever having at one end thereof a sharpening device, and means actuated by the foot of the operator for carrying said device into and out of engagement with the edge of the disk at will.

3. A disk-sharpening attachment for cultivators, comprising a pivoted longitudinallyshiftable lever having at one end thereof a sharpening device, means for operating the lever to carry said device into and out of engagement with the edge of the disk, at will, and means for varying the angle at which said lever approaches the disk.

4. A disk-sharpening attachment for cultivators, comprising a pivoted longitudinallyshiftable lever having at one end thereof a sharpening device, means for operating the lever to carry the sharpening device into and out of engagement with the edge of the disk, at will, and a clamp for detachably securing said device to the lever. 5. The combination with a cultivator having a disk, of a sharpening attachment mounted upon a part of the cultivator, comprising a pivotally-mounted shiftable sharpening device, and means for carrying said device into and out of engagement with the edge of the disk'at will.

6. The combination with a cultivator having a disk, of a sharpening attachment mounted upon a part of the machine, comprising a pivoted shiftable sharpening device, means for carrying the latter into and outof engagement with the edge of the disk, at will, and means for varying the angle of approach of said device to the disk.

7 The combination with a cultivator having a disk, of a sharpening attachment carried thereby and consisting of a bracket, a shifting lever slidably and pivotally held by the said bracket, a cutter removably attached to the lever, means for varying the angle of movement of the lever and cutter, and means for operating the lever to carry the cutter into engagement with the disk edge at will.

8. The combination Witha cultivator having a disk, of a sharpening attachment carried thereby and consisting of a depending support having clip means, and a shiftable sharpening device connectedto said clip means, and other clip means having primary actuating devices in engagement with the attachment and operative to vertically adjust the sharpening attachment as an entirety.

9. Adisk-sharpening attachment for cultivators, comprising a bracket secured to a part of the machine, and provided with lateral projections having alining threaded openings therein, a slotted shiftable lever working on a stud on the bracket, and having a lug disposed intermediate of the lateral projections, means for operating the lever, and adjustingscrews for the latter, working vthrough the openings in said lateral projections on opposite sides of said lug, said lever carrying a sharpening device.

10. A disk-sharpening attachment for cultivators, comprising a pivoted longitudinallyshiftable lever having at one end thereof a sharpening device, and also having a lateral outstanding lug, a pivoted slotted actuatinglever for said first-named lever, and means for operating said actuating-lever.

In testimony whereof I affix my signature in I presence of two witnesses. V

HENRY BURFOR-D.

Witnesses:

ARTHUR P. MAHIEN, ,JOHN L. VVYMER. 

